A must for your pinball toolbox! A set of nut drivers are essential for any kind of pinball machine work- for most any playfield or mechanical part repair or service. Set includes nut drivers from 1/4-inch all the way up to 1/2 inch, and also includes the most common 5/16-inch and 11/32-inch sizes for playfield nylock nuts as used on most solid-state games 1977-up to secure plastics, posts, and ramps. You'll wonder how you ever did without a set!